Mason&#39;s plumb and level.



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MASUN'S PLUMB AND LEVEL.

(Application ld la. 7, 1901.)

(No Model.)

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rarer ANDREW L. IWICREYNOLDS, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO CHARLES F. THOMAS, OF CLEVELAND, OHIO.

WHASONS PLUNlB AND LEVEL.

SEECIFICATICN forming part of Letters Patent No. 700,971, dated May 27, 1902.

Application led March 7, 1901.

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Beit known that I, ANDREW L. MCREY- NOLDS, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Masons Plumbs and Levels, of which the following is a specication that will enable those skilled in the art to which my invention pertains to make and use 1o the same, reference being had to the accompanying drawings.

My invention relates to the plumb-boards used by masons or bricklayers. Its object is to adapt such boards to gage horizontal and inclined as well as vertical work and adjustable to any desired inclination Vor batter; and it consists of a plumb-board equipped with one or more adjustable spirit-levels let into its surface and adapted to be set at any dezo sired angle or angles, so that the one instrument may be used on several kinds of work that may be progressing simultaneously.

The accompanying drawings show my invention in the forms now considered most desirable by me; but many changes obvious to a skilled mechanic and not requiring the exercise of invention might be made in the details thereof and some of the parts used without others or with others of dilferent con- 3o struction,but effecting the same objects,with out departing from the spirit of myinvention as set forth in the claims at the end of this specification.

Figure 1 is a side elevation of a masons plumb-board with my improvements applied thereto. Fig. 2 is an enlarged detailed side elevation of the preferred form of screw adjustment and indicator-gage of a spirit-level applied to a masons plumb-board. Fig. 3 is 4o a vertical transverse section of the same on the line 3 3 of Fig. 2. Figs. 4 and 5 illustrate a modication of my spirit-level adjustznent.

In the preferred form shown in Figs. l, 2,

4.5 and 3 of the drawings I cut an opening through the board, preferably near its upper end, the outline of this opening being represented by the arched line a, inclined side lines a', and rectangular side lines d2, includfio ing also the small cavity or opening di near Serial No. 50,192. (No model.)

the left-hand side of Fig. 2. In this opening I mount my mechanism, consisting of a rectangular frame B, partially covered by side plates b, between which is located a lever C, mounted on a pivot-pin c, having bearings in the side plates. This lever projects through a slot d in the upper side of the-frame B and is bifurcated at its upper end, with a spiritlevel tube E supported by the forks c c. The lower end of the lever is provided with guidei'langes f, between which lies a sliding plate G, having a slot g, through which passes a screw F, which holds the plate in position while allowing it to reciprocate. The lower end of the plate is secured bya pivot-screw 7L to a side flange extending from ascrew sleeve or nut H, mounted on a screw I, having suitable bearings in the side bars of the frame B and provided with a thumb-wheel c', which lies outside of the frame and in the opening d3, so as to be accessible from either side of the board. On each side of the plates b is laid out a segmental scale J, which is traversed by a pointer K, attached to the lever above the frame B, shown so as to partake of the movements of the lever and indicate the angle of inclination of the spirit-level. These pointers might be attached to pivot-pin of the lever if said pin is made rigid with and moves in unison with the lever.

To protect the mechanism from injury, I cover it on both sides with metal plates L, let flush into the surface of the plumb-board and held, preferably, by screws Z. These plates are provided with openings M in front of the spirit-level and N in front of the segmental scales to permit of seeing same, and I prefer to glaze the openings by pieces of glass m and a to exclude dirt, &c. The plates also have openings o, which register with the hole d3 and permit of access to the thumb-Wheelfi in said hole.

In operation the spirit-level may be tilted to any desired angle by turning the thumbwheel c' and rotating the screw, which causes the nut I-I to move and rocks the lever and spirit-level carried thereby to any desired point indicated by the movement of the hands or pointers on the scale.

The sliding movement of the plate G on the IOO . ring P, as shown.

bearing.

lever compensates for the difference between the straight movement of the nut and curved motion of the end of the lever.

In Figs. 4 and 5 I show a modification of my invention which in many cases will be very desirable, though it is not so easy of access and readily adjustable as the mechanism just described. In this modification I make a straight cylindrical opening through the plumb-board and secure in it a ring l), having a lateral iiange p, by which it may be secured in place by screws, as shown. The thicker portion of the ring is internally screwthreaded, as shown, and there is screwed into it a ring Q, which carries a spirit-level glass q. The abrupt shoulder or face 0" of the ring P is provided with suitable scale-markings R and the spirit-level ring with a gage-lines to guide adjustments to the scales. The angle of the spirit-level relatively to the board is changed by rotating its ring Q in the screw- The opening in the ring or frame is closed by a glass face T, held in place by a small screw-ring t, as shown. The other side of the board is provided witha ring U, which telescopes and fits closely into the end of the This ring U has a flange u, by means of which it is secured to the board by screws. The opening in the ring U is closed by a glass face V, held into the ring in any suitable manner.

It is intended that the ring P and the spiritl'evel ring Q shall be flXtu res in the board and that'any adjustment shall be made by the removal of the ring U which will allow of access to and manipulation of the spirit-level, the gage-markin gs being visible from that side of the instrument.

I prefer to equip my plump-boards with several adjustable spirit-levels, as shown in Fig. 1, so that it may be set for several different angles of inclination at once and used on any of them without necessarily changing the others. These may all be of either of the forms of mechanism shown-that is, all like Figs. 2 and 3 or all like Figs. tand 5, or part of each.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of a masons plumbboard with an opening therethrough containing a pivoted lever, a spirit-level attached to and supported by one end of the lever, a transverse screw with a nut adapted to engage the opposite end of the leverand swing it on its pivot and a thumb-wheel on the screw lying in the opening of the board and accessible from both sides thereof.

2. The combination of a masons plumbboard having an aperture therethrough, a frame B, secured in said aperture, a bifurcated lever C, pivoted between the sides of said frame and carrying a spirit-level E, in its forks above the pivot, a transverse screw mounted in the frame and provided with a thumb-wheel, with a threaded sleeve on the screw and a plate G, slidingly secured to the lower end of the lever and pivotally connected to the threaded sleeve substantially as hereinbefore set forth.

3. The combination of a masons plumbboard having an aperture therethrough, a frame B, secured in said aperture, a bifurcated lever C, pivoted between the sides of said frame and carrying a spirit-level E, in its forks above the pivot, a transverse screw mounted in the frame and provided with a thumb-wheel, a threaded sleeve on the screw, a plate G, slidingly secured to the lower end of the lever and pivotally connected to the sleeve, with a graduated indicated scale on each outer face of the frame B, and pointers attached to the lever with their free ends adjacent to the said scales, substantially as hereinbefore set forth.

it. The combination of a masons plumbboard having an aperture therethrough, a frame B, secured in said aperture, a lever pivoted between the sides of said .frame and carrying a spirit-level, a transverse screw mountedin the frame and provided with a thumb-wheel, a threaded sleeve on the screw with a pivoted sliding connection to the lower end of the lever, a graduated indicatingscale on'each outer face of the frame B, and pointers attached to the lever having their free ends adjacent to the said scales, with metallic side plates L, to inclose the aperture in the board, each provided with an opening for the thumb-wheel and also glazed openings before the spirit-level and the graduated scales, substantially as hereinbefore set forth.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing witnesses.

ANDREW L. MCREYNOLDS.

Witnesses:

GEORGE C. IIANsEN, WM. A. SKINKLE.

IOO 

